1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11be17ea9641663f0078a355c2d3f3170f44909ce2991eeb30481e1ea406f86e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35910721-90dd-443e-8ff0-d3d9ecb66b5d.json and https://artists.proofprofile.net/proofs/artist/35910721-90dd-443e-8ff0-d3d9ecb66b5d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038dca5f3947857a42634aefdd3c98ad591742c9f4e00a23624a9e6a529a49d0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC8TH2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354cda868c125607e0158bcab4b043e1b4223ea0b3c96dde46a5602c7a61fe73. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC8TH2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b4ae13aa799de90b91292aa0f4019bafa59b1725a121fc85df74415f4ff739. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC8TH2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1812c36feefb174d5c3c2a4800105feca23470283313ff6a8996c283cd49b409. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC0SX2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3269a229a56de42b03379560eb0e6c5037793add8e3989092547927bfa2312db. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC8TH2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb510a43c819d0650dc5ba3973503e15395159c827d8fdcd484e7d279c07cef0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC8TH2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ad391ee7249b72634d484efcd80634b4494375887c8a9500f1c87061c53f77. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC0SX2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71a0a38a0a5fd447fa6cbce768488aa46e9339e18c968ca83212b79ede9fff9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC8TH2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1742c6c73d2bb3b2c4b8dba014abd64cf9e4447c0009db0aa9d49676f9393f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC8TH2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358eeae1ba36bac77cfb5b7e67a62f3604413e1df1915b1bd53f65a652377c5d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC8TH2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d259e47dec18d67879a84a2701de35cd9b82b91c8c310c4fbde531c019741dd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC8TH2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91d387325f0c98060205e5f5f973e6c80cae69dec05bb87ea41229a4fca4b8f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC8TH2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1742c6c73d2bb3b2c4b8dba014abd64cf9e4447c0009db0aa9d49676f9393f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC8TH2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2140f4016b8a93cc07abfd73eb4807e9dcdf01f69b233aded4c10f4556b190e8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC8TH2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e6797a9cc616fbc86985ced9ae05b975cf514b68b3117acd84ce00631d7f8f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCEOG2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ae3a36979d3791fbb80cc6974f58c82921b67cbd6cc54ebc9adce8c54fd037. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRRGE2300615.